Comtech EF Data UT-4500 Series - Manual (Page 79)

UT4500 Series Up Converter MN/UT4500.IOM
Remote Control Revision 2
61
5.5 M
ESSAGE
S
TRUCTURE
The structure of either a Command , Response or Error Message is as follows:
Start Character.
Device Address.
Command or Response.
End of Message String.
5.5.1 S
TART
C
HARACTER
The Start Character begins each message:
Example:
< Start of a user Command.
> Start of a converter response.
5.5.2 D
EVICE
A
DDRESS
The Device Address consists of a Physical Address or a Physical Address and an
appended Virtual Address. For this document DEV is used for the generic case
examples.
Example: <3V12
5.5.3 C
OMMAND
A Command is a variable length character string beginning with a / and containing either
an instruction or an instruction and data for a converter to act upon. If data is passed by
command it is appended to the instruction by an underscore( _ ). If data is retrieved by
command underscore follows the instruction flagging the converter to supply data in a
response. In this document /COM is used for the generic case examples.
Example:
<DEV/COM_xxx'cr' Sends data to a converter.
Example: <DEV/COM_'cr' Requests information from a converter.
5.5.4 C
ONFIRMATION
R
ESPONSE
A confirmation will change the start character, and echo the Device Address and
Command. Any requested data will be appended to the Command.
Example: >DEV/COM_xxx'cr''lf']